1331833 九、發明說明： 【發明所屬之技術領域】 【先前技術】 本發明係關於-種電子裝置之電源電路，_是一種利用通 用串列匯流排與充電輯電子錢之電池進行充電之電源電路。 隨著資訊之發展，可攜式電子裝置如手機、個人數位助理1331833 IX. Description of the invention: [Technical field to which the invention pertains] [Prior Art] The present invention relates to a power supply circuit for an electronic device, and _ is a power supply circuit for charging a battery using a universal serial bus and a charging electronic money battery . With the development of information, portable electronic devices such as mobile phones and personal digital assistants
(p_al Dlgital Assistant; PDA)、數軸機以及電子翻譯機等 之應用已IM日及’這些電子褒置通常是由内部之鐘電池供應運 作所需之魏’一旦㈣池耗㈣量就必須再充電。大多數的電 子農置係湘-外接的充電料行_電池充電或直接予以供 電，然而’通常-種充電||只_於—種電子裝置，因此，當使 用者擁有錄電子裝置時’同樣地亦必須有多種她之充電器， 然而，多個充電器對於收藏或外出攜帶皆不甚方便。 一種通用串列匯流排（Universal Serial Bus ; USB)，其廣泛 地設置於電腦系統與上述之電子裝置等，通用串_流排具有資 料線與電力介面，透過通用串列匯流排將電腦系統與電子裝置相 連接，電腦系統可透過資料傳輸介面以對電子裝置進行資料串列 傳輸，並透過電力介面以供應驅動電手裝置之電源，於此，若能 設計利用通用串列匯流排對電子裝置進行充電，實可解決多個充 電器之問題。 不過礙於電腦系統之通用串列匯流排的最大輪出電流僅為 500毫安培(mA)，若欲利用通用串列匯流排對電子裝置進行充 5 1331833 池充電’可有效解決習知多個充電器之不便，對使用者而言確實 增加了使用上的方便性。 、 以上之關於本發_容之說明及以下之實施方式之說明係用 以示範與解釋本發明之精賴原理，並且提供本發明之專利申請 範圍更進一步之解釋。 【實施方式】 以下在貫施对情細敘述本發明之詳細特徵以及優點，其 I内谷足以使任何熟f相關轉者了解本發明之技術内容並據以實 施’且根據本說明書所揭露之内容、申請專利範圍及圖式，任何 燕1相關技#者可輕易地理解本發明相關之目的及優點。 「第1圖」係為本發明之電子裝置的電源電路方塊圖，如圖 所不’電源電路1〇包括有外接電源切換電路im、電池充電管理 積體電路102、電流調節電路1〇3以及電池1〇4。適用此電源電路 之皂子装置係為可攜式電子裝置如手機' 個人數位助理 (PDA)、數位相機以及電子翻譯機等。 外接電源切換電路1〇1具有至少雙電源輸入，分別為通用串 列匯流排201與充電器3〇，通用串列匯流排2〇1係為電腦系統2〇 之傳輸;I面’電腦系統2〇透過串列匯流排2〇1之電力介面v^us 輸出電源至外接電源切換電路101;充電器30連接至外部電源4〇 (諸如習知家用之交流（AC)電源插座或汽車中的直流（DC) 電源插口）’外接電源切換電路101即可透過充電器30轉換外部 電源40之電源以獲取所需之直流電源’例如交流電/直流電轉換 7 1331833 ，趣電轉換。外接電源切換電路 與充電器30之間自動選擇適 =用串列匯 腦充電，根據本發明一實施例，係 / #效率地對電池 當外接電源切換電路1〇1先連接至==’亦即， 接取電源時，_電轉電路谢過其 時則切換至_ 3G，係透過_ 3 ，時，此 除就再切換回通用串列匯*# —充電器30拔 供電。 物旭机排Μ，再透過通用串列匯流排加 電池充電管理積體電路1〇2 肋、電流調節電路⑽以及電池m至接tt電源切換電路 藉由通用串列匯$"、切換電路而 電池Μ 電器3〇獲取_後，將電源輪入至 電池充電傾龍電路逝，電 盥外桩s柱檟骽窀路串聯電池104 1〇1, 及二(Τι.電壓或電流傷害電池1G4,並且防止短路以 電池104之電池芯損壞，可達成保護電路之目的。 電流調節電路103用以調整充電電流之大小，由於通用串列 排201的最大輸出電流僅為5〇〇毫安培，因此，當外接電源 切換電路101僅連接通用串列匯流排加時，電流調節電路1〇3、 會將充電電流調切滿足電子裝置1G_ 毫安培之剩餘電流 而運作時’將不會發生供電*足之狀況。另-方面，當外接電源 切換電路101連接充電器3G時，由於充電器3G所接之外部電源 40之電流大至足以供應電子裝置10同時充電與運作所需，因此， 1331833 電流f電路1G3會將歧綠調大，以純充電飽和之速度。 〜也ι〇4，係提供電子裝置1〇運作所需之電源，電子裝置1〇 可透過通用串列匯流排201或充電器3〇直接供電，-曰通用串 ::匯流細與充電器30接拔除後，仍需由電池心^ :恤1G4於_糾必需再充電之目的。根據 盆傭2，'蝴，電池104係為可再充電型_子電池或一些 其他類型之可再充電型電池。 一 ^ΓΓ第2A圖」’鱗本购之峨源蝴路谢之 , , 101 =φ、電隨〜R3以及電如等元件，其中電隨 f，f C1錢⑽肖除魏魏，電可連接至通用 曰=匯流排2〇1與充電器3〇，當僅有通用串列匯流排加連接電 =體Φ時，電晶體Q1透過電阻R1之偏壓以導通閘極使得通用 自f ’此時’無充電器3G連接至電晶體Φ， 私曰曰Φ之基極無偏壓，而連帶電晶體Q2皆益導通’電 為麵狀態以防止通用串列匯流排观之電源回灌而 =誤動作。當_ 3G連接至電晶體Qi與電晶師，電晶 =關閉以使得通用串列匯流獅停止供電，電晶體Q3之基 極仵到碰使得咖φ導通並連帶電晶體㈣通，充電哭 ^則透過電晶體Q2供應魏。另外，電晶體印之基極另設有 ,、他偏歧制線路(糖示），以避免電路產生誤動作。請參昭「第 2B圖」’係為本發明之另—較佳外接電源切換電路⑽之電路圖， 9 1331833 如圖所示，外接電源切換電路i01可用二極體Di代換「第2a圖」 之電晶體Φ，如此方式將可節省成^㈣本發明—具體實施 例，電晶體Q1與電晶體Q2係為—種金屬氧化半導體場效電晶 體（Metal 〇xlde Semic〇nduct〇r ?1别班⑽丁麵； MOSFET)。 請參照「第3A圖」’係為本發明之電流調節電路103之電路 圖，如圖所示，電流調節電路103組態成包括有電晶體以以及 •電阻R4〜R6,電晶體Q4可連接至充電器3〇,當充電器3〇接上時， 電晶體Q4導通，電阻R4與電阻R5並連，致使阻抗變小而加大 了充電電流；當充電器3〇拔除後，若還有通料列匯流排2〇ι連 接至外接電源切換電路1G1而提供電源，此時，電晶師關閉， 僅剩電阻似提賴降，於此，峨她於《後錄抗為大，而 縫電流變小。舉例而言，電阻R4與電阻R5之大小分別為咖 歐姆⑼與3.6k歐姆⑼，以電晶體叫乍為充電電流之切換， • ’當電晶體Q4導通而兩電阻並聯時（即利用充電器30供 ： 充電電流約為300毫安培，當電晶體Q4關閉而只有電阻似 .提供壓降時（即利用通用串列匯流排20!供電），充電電流約為 :一毫安培。另外’電晶體Μ之閘極另設有其他偏壓控制線路(未 繪不），以避免電路產生誤動作。請參照「第3B圖」’係為本發明 之另-較佳電流調節電路1G3電路圖，如圖所示，電流調節電路 ⑽可只用-個電阻R7取代「第3A圖」之電晶體Q4以及電阻 R6於此’不官外接電源切換電路101連接係為通用串列匯 10 1331833 流排201或充電ξ§ 30，充電電流皆相同， 2〇1供電時，將有相對「第3A圖」較高的充電電流之需 =:_作時’卻不會有供電不足之情形： 此方式更有㈣成本之效益。根據本發明一具體實施例，電 Q4係為-種金屬氧化半導體場效電晶體。 曰曰體 雖然本發明以前述之實施例揭露如上，秋 發明。在不本魏之精神和朗内，^ 部定= 所附之申請專利範圍。 。疋之保摘清參考 【圖式簡單說明】 第1圖為本發明之電子裝置的電職路方塊圖； f2A圖為本發明之外接電源切換電路之電路圖； =圖為本發明之另一較佳外接電源切換電路之電路圖； 圖為本發明之電流調節電路之電路圖；以及 第3B圖為本發明之另一較佳電流調節電路電路圖。 L主要元件符號說明】 〇.........................源電路 20.........................腦系統 30........................充電器 40.........................部電源 101......................外接電源切換電路 ......................池充電管理積體電路 π 1331833 103 ......................電流調節電路 104 ......................電池 201......................通用_列匯流排 C1........................電容 D1.......................二極體 R1-R7.................電阻 Q1-Q4................電晶體Applications such as (p_al Dlgital Assistant; PDA), digital axis machines, and electronic interpreters have been re-charged on IM Days and 'These electronic devices are usually required to operate from the internal clock battery supply. Once (four) pool consumption (four) amount must be recharged . Most of the electronic farms are equipped with an external charging device. The battery is charged or directly powered. However, the 'normal type of charging|| is only for an electronic device, so when the user owns the electronic recording device, the same There must also be a variety of her chargers, however, multiple chargers are not convenient for collection or outing. A universal serial bus (USB), which is widely installed in a computer system and the above-mentioned electronic device, etc., the universal string_flow bar has a data line and a power interface, and the computer system is connected through the universal serial bus bar and The electronic device is connected, and the computer system can transmit the data to the electronic device through the data transmission interface, and supply the power of the electric hand device through the power interface. Here, if the universal serial bus bar pair electronic device can be designed and utilized Charging can solve the problem of multiple chargers. However, the maximum output current of the universal serial busbar of the computer system is only 500 milliamperes (mA), and if the universal serial busbar is used to charge the electronic device to charge 5 1331833 pool, it can effectively solve the conventional multiple charging. The inconvenience of the device does increase the convenience of use for the user. The above description of the present invention and the following description of the embodiments are intended to demonstrate and explain the principles of the invention, and to provide further explanation of the scope of the patent application of the present invention. [Embodiment] Hereinafter, the detailed features and advantages of the present invention will be described in detail, and the I valley is sufficient for any skilled person to understand the technical content of the present invention and to implement 'and according to the present specification' The content, the scope of the patent application, and the drawings, any of the objects and advantages of the present invention can be easily understood. FIG. 1 is a block diagram of a power supply circuit of the electronic device of the present invention. As shown in the figure, the power supply circuit 1 includes an external power supply switching circuit im, a battery charge management integrated circuit 102, and a current adjustment circuit 1〇3. Battery 1〇4. The soap device for this power circuit is a portable electronic device such as a mobile phone 'personal digital assistant (PDA), digital camera, and electronic translator. The external power switching circuit 101 has at least dual power input, which is a universal serial bus 201 and a charger 3, respectively, and the universal serial bus 2〇1 is a transmission of the computer system 2;输出 output power to the external power switching circuit 101 through the power interface v^us of the serial bus 2〇; the charger 30 is connected to an external power supply 4〇 (such as a conventional household AC (AC) power outlet or a DC in a car (DC) power socket) 'External power switching circuit 101 can convert the power of external power supply 40 through charger 30 to obtain the required DC power supply', such as AC/DC conversion 7 1331833, interesting conversion. The external power switching circuit and the charger 30 are automatically selected to be charged by the serial brain. According to an embodiment of the invention, the battery is connected to the external power switching circuit 1〇1 first to the ==' That is, when the power is taken, the _ electric circuit is switched to _ 3G, and the _ 3G is transmitted through _ 3 , and then the switch back to the universal serial port *# — the charger 30 pulls the power supply.物旭机排Μ, and then through the universal serial bus and battery charge management integrated circuit 1〇2 rib, current adjustment circuit (10) and battery m to tt power switching circuit by universal serial port $", switching circuit After the battery 电器 electric appliance 3 〇 gets _, the power supply wheel is turned into the battery charging dying circuit, the electric raft pile s column 槚骽窀 串联 串联 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 And preventing the short circuit from being damaged by the battery core of the battery 104, the protection circuit can be achieved. The current adjustment circuit 103 is used to adjust the magnitude of the charging current, since the maximum output current of the universal serial array 201 is only 5 mA, When the external power switching circuit 101 is only connected to the universal serial bus, the current regulating circuit 1〇3 will adjust the charging current to meet the residual current of the electronic device 1G_mA, and the power supply will not occur. In other aspects, when the external power switching circuit 101 is connected to the charger 3G, since the current of the external power source 40 connected to the charger 3G is large enough to supply the electronic device 10 for simultaneous charging and operation, Therefore, 1331833 current f circuit 1G3 will adjust the green color to the speed of pure charge saturation. ~ Also ι〇4, is the power supply required for the operation of the electronic device, the electronic device 1〇 can be transmitted through the universal serial bus 201 Or charger 3 〇 direct power supply, - 曰 universal string:: sinking fine and charger 30 after the removal, still need to be by the battery heart ^ : 1G4 in the _ corrective recharge purpose. According to the potter 2, 'butterfly, The battery 104 is a rechargeable type _ sub-battery or some other type of rechargeable battery. A ^ ΓΓ 2A "" scales purchased by the source of the butterfly road Xie Zhi, , 101 = φ, with the ~ R3 And electricity such as components, which electricity with f, f C1 money (10) Xiao Wei Wei Wei, electricity can be connected to the universal 曰 = bus 2 〇 1 and charger 3 〇, when only the universal serial bus plus connection = When the body is Φ, the transistor Q1 is biased through the resistor R1 to turn on the gate so that the general-purpose 'f' at this time no charger 3G is connected to the transistor Φ, and the base of the private Φ is unbiased, and the charged crystal Q2 is all connected to the 'electrical surface state to prevent the power supply of the universal serial bus rectification and the power supply to be backed up = wrong. When _ 3G is connected to Crystal Qi and electro-crystallizer, electro-crystal = turn off to make the universal serial lion lion stop power supply, the base of the transistor Q3 slams into contact, so that the coffee φ is turned on and connected with the transistor (four), charging crying ^ through the transistor Q2 supply In addition, the base of the transistor is additionally provided, and he is biased to make the circuit (sugar display) to avoid malfunction of the circuit. Please refer to "2B" as another of the invention - better external Circuit diagram of the power switching circuit (10), 9 1331833 As shown in the figure, the external power switching circuit i01 can replace the transistor Φ of the "Fig. 2a" with the diode Di, so that the invention can be saved as (4) the present invention - the specific embodiment The transistor Q1 and the transistor Q2 are a metal oxide semiconductor field effect transistor (Metal 〇xlde Semic〇nduct〇r?1 other class (10) butyl surface; MOSFET). Please refer to "FIG. 3A" as a circuit diagram of the current regulating circuit 103 of the present invention. As shown, the current regulating circuit 103 is configured to include a transistor and a resistor R4 R R6, and the transistor Q4 can be connected to Charger 3〇, when the charger 3 is connected, the transistor Q4 is turned on, and the resistor R4 is connected with the resistor R5, so that the impedance becomes smaller and the charging current is increased; when the charger 3 is removed, if there is still The material bus bar 2〇 is connected to the external power switching circuit 1G1 to provide power. At this time, the electro-ceramics is turned off, and only the resistance is like the drop-off. Here, she is in the post-recording resistance, and the slit current Become smaller. For example, the resistance R4 and the resistance R5 are respectively ohms (9) and 3.6k ohms (9), and the transistor is called the charging current switching. • 'When the transistor Q4 is turned on and the two resistors are connected in parallel (ie, using the charger) 30 for: The charging current is about 300 mA. When the transistor Q4 is turned off and only the resistance is similar. When the voltage drop is provided (that is, using the universal serial bus 20!), the charging current is about one milliamperes. The gate of the crystal 另 is additionally provided with other bias control lines (not shown) to avoid malfunction of the circuit. Please refer to "3B" as another circuit of the invention - preferred current regulation circuit 1G3, as shown in the figure As shown, the current regulating circuit (10) can replace the transistor Q4 of "3A" and the resistor R6 with only one resistor R7. The connection of the external power supply switching circuit 101 is a universal serial port 10 1331833 flow row 201 or Charging ξ § 30, the charging current is the same, when 2 〇 1 power supply, there will be a higher charging current than "3A" = = _ time ', but there will be no power shortage situation: This method has more (iv) the benefit of cost. According to the invention In the embodiment, the electric Q4 is a metal oxide semiconductor field effect transistor. Although the invention is disclosed in the foregoing embodiments, the invention is as follows. In the spirit of the Wei and the Lang, the part is attached = The scope of application for patents. 疋 保 摘 参考 【 【 【 【 【 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a circuit diagram of a current regulating circuit of the present invention; and FIG. 3B is a circuit diagram of another preferred current regulating circuit of the present invention. .......................source circuit 20........................ Brain System 30.................. Charger 40................... ...partial power supply 101......................external power supply switching circuit............... ....... pool charge management integrated circuit π 1331833 103 ...................... current regulation circuit 104 ........ ..............Battery 201......................General_Column bus C1..... ...................capacitor D1.......................dipole R1-R7 .................resistance Q1-Q4................transistor
1212